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Corky

My roses are leafed out: I missed the dormant spray, now what?

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We got back into town long after my roses had left dormancy behind. My habit of pruning them to 6" had to be abandoned. It was nearly the end of April and had been a warm spring; things had gone wild!

 

Suddenly I remembered dormant oil and lime suffer and those spring things it was already too late to do. Now what? Can I dormant spray with half strength oil like one can a pine during the growing season (for pine bark adgelid) for example? With or without the lime suffer? If not that, what should I spray roses with, and when? At this point they look healthy and have no infestations.

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That's just a fungicide, really, and happens to be the one appropriate to the earliest time of black spot activity. But not appropriate for plants in leaf, too harsh. So simply move to growing season fungicides. You can use the lighter weight oils now.

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